Which of the Following Situations Occurs in Electrically Excitable Cells

question 173

Multiple Choice

Which of the following situations occurs in electrically excitable cells?

• A)When Na+ ion channels open,K+ ion channels close.
• B)The sodium-potassium pump moves sodium into the cell.
• C)Depolarization causes voltage-gated sodium ion channels to open.
• D)Sodium ion channels are opened by high extracellular calcium levels.
• E)The opening and closing of ligand-gated channels cause depolarization.

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Definitions:

True Vocal Cords

The vocal folds in the larynx, mainly involved in producing sound for speech.

Cricoid Cartilage

A ring-shaped cartilage forming the lower part of the larynx and providing connection to the trachea.

Primary Bronchi

The two main branches of the trachea that lead into the lungs, providing a pathway for air to enter and exit the lungs.

Gas Exchange

The biological process through which different gases are transferred in opposite directions across a specialized surface, such as in the lungs or leaves of plants.